Steve Silverman, Google operations manager, wears the Trekker backpack camera during a demonstration for the media Oct. 22 along the Bright Angel Trail at the South Rim of Grand Canyon National Park in Arizona. Google is using the 40-pound camera to showcase the Grand Canyon's most popular hiking trails. Rick Bowmer, AP

The Google Trekker backpack camera is 4 feet high when sitting on the ground. Rick Bowmer, AP